In August, the weather in Bad Neuenahr-Ahrweiler is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Bad Neuenahr-Ahrweiler has 12 sunny, 12 partly cloudy, and 7 rainy days in August. The rains are usually moderate. August as well as September is considered the most comfortable time to visit Bad Neuenahr-Ahrweiler.